I owned them all and used a towel to separate the controller from the head. Done, worked like a charm. No trickery involved, at all!
I even included the towel with the whole unit when I decided I wanted a rack unit instead, the new owner was impressed lol. I admit that it was a bit of a tight zip-up but the bag held it no prob and it also held the cables, xtra guitar cables, Mission pedal and xtra pedals... worked perfectly!